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Density functional theory study on structure and stability of BeB n + clusters
Author(s) -
Liu Chunhui,
Si Hongyan,
Han Peilin,
Tang Mingsheng
Publication year - 2017
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.7882
Subject(s) - chemistry , fragmentation (computing) , alkali metal , binding energy , boron , boride , atomic physics , crystallography , chemical physics , computational chemistry , molecular physics , inorganic chemistry , physics , organic chemistry , computer science , operating system
Rationale Boride compounds hold promise for broad applications in the field of optoelectronics due to their high‐temperature resistant, corrosion resistant and antioxidant properties. In order to reveal the formation mechanism of alkali and alkaline earth metal doped boron clusters, theoretical studies of these systems are required. Methods All the possible geometrical structures of BeB n + clusters (n = 1–8) were optimized at the B3LYP/6–311+G(d) level; the harmonic vibration frequencies were obtained to examine the true stability and give the zero‐point vibration energy at that theoretical level. The single point energies of all the structures were computed at the CCSD(T)/aug‐cc‐pVDZ level. For the most stable structures, the average binding energy ( E b ), the fragmentation energy ( E F ) and second‐order difference of total energy (Δ 2 E ) were used to evaluate the relative stability of clusters. Results Most of the BeB n + clusters are planar in structure; the B atoms tend to aggregate to form a boron ring, and the coordinating Be atoms are on the periphery of the clusters. The fragmentation energy and second‐order difference of total energy show that there is an obvious odd‐even alteration as n increases, and local‐maxima when n is odd. Conclusions A systematic theoretical investigation on the geometries, stabilities and electronic properties of BeB n + clusters has been carried out where n = 1–8. The results provide a useful reference for understanding the formation mechanism and stability of these clusters, as well as guidance for finding larger size clusters.